Popular student Matthew was stabbed 37 times by his killer, who left him in a Whalley Range alleyway.

Police want to trace the person who made two silent 999 calls from a nearby phonebox one hour before Matthew's body was found.

A £10,000 reward has today been offered for anyone who can help in the bid to solve the February 2 killing.

Chief investigator, Det Supt Neil Booth, says it's not too late to come forward and help the police.

"I would believe that whoever carried out that attack would have been bloodstained and may have gone home and may have been noticed by someone else that they were bloodstained," Det Supt Booth said.

"Over the months that have gone past they would have spoken about it and that's why I would ask anybody with information that we haven't already received at the inquiry to speak to us now. It's not too late."